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Valorization of Lignin to Simple Phenolic Compounds over Tungsten Carbide: Impact of Lignin Structure
Guo, Haiwei1,2; Zhang, Bo1; Qi, Zaojuan1,3; Li, Changzhi1; Ji, Jianwei1,4; Dai, Tao1,2; Wang, Aiqin1; Zhang, Tao1
KeywordAromatics Biomass Lignin Methanol Tungsten Carbide
Source PublicationCHEMSUSCHEM
2017-02-08
ISSN1864-5631
DOI10.1002/cssc.201601326
Volume10Issue:3Pages:523-532
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordMOLYBDENUM CARBIDE ; ETHYLENE-GLYCOL ; LIGNOCELLULOSE FRACTIONATION ; BIRCH WOOD ; 2D NMR ; CATALYSTS ; CONVERSION ; CHEMICALS ; CELLULOSE ; MONOMERS
AbstractLignins isolated from representative hardwood, softwood, and grass materials were effectively hydrocracked to aromatics catalyzed by tungsten carbide over activated carbon (W2C/AC). The effects of botanical species and fractionation methods on lignin structure and the activity of W2C/AC were studied in detail. Gas permeation chromatography (GPC), FTIR, elemental analysis, and 2D HSQC NMR showed that all the extracted samples shared the basic skeleton of lignin, whereas the fractionation method significantly affected the structure. The organosolv process provided lignin with a structure more similar to the native lignin, which was labile to be depolymerized by W2C/AC. Softwood lignins (i.e., spruce and pine) possessed higher molecular weights than hardwood lignins (i.e., poplar and basswood); whereas corn stalk lignin that has noncanonical subunits and exhibited the lowest molecular weight owing to its shorter growth period. beta-O-4 bonds were the major linkages in all lignin samples, whereas softwood lignins contained more resistant linkages of beta-5 and less beta-beta than corn stalk and hardwood lignins; as a result, lowest hydrocracking efficiency was obtained in softwood lignins, followed by corn stalk and hardwood lignins. 2D HSQC NMR spectra of lignin and the liquid oil as well as the solid residue showed that W2C/AC exhibited high activity not only in beta-O-4 cleavage, but also in deconstruction of other ether linkages between aromatic units, so that high yield of liquid oil was obtained from lignin.
Language英语
WOS IDWOS:000394572100008
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169665
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi, Changzhi; Zhang, Tao
Affiliation1.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Xiangtan Univ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China
4.Shaanxi Sci Tech Univ, Sch Chem & Environm Sci, Shaanxi Key Lab Catalysis, Hanzhong 723001, Peoples R China
Recommended Citation
GB/T 7714
Guo, Haiwei,Zhang, Bo,Qi, Zaojuan,et al. Valorization of Lignin to Simple Phenolic Compounds over Tungsten Carbide: Impact of Lignin Structure[J]. CHEMSUSCHEM,2017,10(3):523-532.
APA Guo, Haiwei.,Zhang, Bo.,Qi, Zaojuan.,Li, Changzhi.,Ji, Jianwei.,...&Zhang, Tao.(2017).Valorization of Lignin to Simple Phenolic Compounds over Tungsten Carbide: Impact of Lignin Structure.CHEMSUSCHEM,10(3),523-532.
MLA Guo, Haiwei,et al."Valorization of Lignin to Simple Phenolic Compounds over Tungsten Carbide: Impact of Lignin Structure".CHEMSUSCHEM 10.3(2017):523-532.
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